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Detecting quadrupole resonance signals using high temperature superconducting resonators

a superconducting resonator and quadrupole resonance technology, applied in the field of quadrupole resonance (qr), can solve the problems of loss of lineshape information, achieve the effects of improving qr detection, dissipating excitation pulse energy, and improving detection performan

Inactive Publication Date: 2009-03-31
PENN STATE RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The HTS probes provide a significant increase in sensitivity and the ability to reject external RF interference, enabling more accurate and efficient detection of explosives, reducing false alarms and improving detection performance per unit time.

Problems solved by technology

In conventional pulsed QR, lineshape information is lost.

Method used

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  • Detecting quadrupole resonance signals using high temperature superconducting resonators
  • Detecting quadrupole resonance signals using high temperature superconducting resonators
  • Detecting quadrupole resonance signals using high temperature superconducting resonators

Examples

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Embodiment Construction

[0041]In pulsed or transient QR detection, a search region is subjected to a series of RF magnetic field pulses and a QR response is detected in the interval between the RF pulses. An apparatus broadcasts short duration radio frequency (RF) pulses using a transmitter coil, and if a target compound (analyte) is present, an RF signal is received by a receiver coil during the interval between the applied pulses. The transmitter coil (normal metal or superconducting) and receiver coil may be the same coil (normal metal or superconducting), or separate coils.

[0042]An QR signal originates from analytes with nuclei that have a nuclear quadrupole moment, such as nitrogen-14 (the common isotope of nitrogen). The QR response from each nitrogen compound has a distinct spectral signature, so that a QR detection system can discriminate among different analytes. In particular, QR can distinguish between types of explosives, such as RDX and TNT, and distinguish them from benign nitrogen compounds ...

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Abstract

Narrowband quadrupole resonance (QR) probes were developed from thin-film high-temperature superconducting (HTS) resonators. The QR probes are useful in analyte-detection systems, in particular for the detection of nitrogen-containing compounds. Embodiments of the invention provide greater than an order of magnitude improvement in sensitivity and the ability to reject RF interference sources located outside the pass-band of a superconducting QR probe. Methods and apparatus are described for analyte detection and resonance frequency adjustment.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application claims reference to U.S. Provisional Patent Application Nos. 60 / 777,476, filed Feb. 27, 2006; 60 / 777,461, filed Feb. 27, 2006; 60 / 782,654, filed Mar. 15, 2006; and 60 / 870,876, filed Dec. 20, 2006, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to quadrupole resonance (QR), in particular to improved QR detection apparatus using high-temperature superconductor (HTS) probes.BACKGROUND OF THE INVENTION[0003]Quadrupole resonance (QR) allows noninvasive, short-range detection of analytes containing nitrogen, including many explosives. Unlike other technologies, a QR detection system can discriminate among different types of explosives and distinguish them from benign nitrogen compounds, because the QR response from each nitrogen compound has a distinct spectral signature.[0004]There is a great current need to detect explosives concealed within containers, su...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01V3/00
CPCG01R33/341G01R33/3671G01R33/441G01N24/084G01R33/34023
Inventor SCHIANO, JEFFREY L.SWAIN, DANIELPUSATERI, MICHAEL A.
Owner PENN STATE RES FOUND
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